| MANAKE09 Limited | Transport & logistics | 2019 |
| Manchester Hacienda Limited | Real estate | 2003 |
| Manchester Skills Academy Limited | Extraterritorial | 2020 |
| Mandrake Newman Ltd | Information & communication | 2026 |
| Mangogo Ltd | Manufacturing | 2019 |
| Manjex Care Services Limited | Health & social care | 2023 |
| Manor Developments (Chesterfield) Limited | Real estate | 1965 |
| Manor Hall Homes Ltd | Construction | 2026 |
| Manor Road Express Limited | Wholesale & retail | 2017 |
| Manor Syck MC Limited | Households | 2023 |
| Mansfield Associates Ltd | Professional & scientific | 2023 |
| Mansfield Property Solutions Ltd | Construction | 2009 |
| Mansfield Worktops (EM) Limited | Construction | 2016 |
| Manton Supplies Limited | Wholesale & retail | 2022 |
| Manvesh Enterprises Ltd | Hospitality | 2013 |
| Manvesh Trading Limited | Wholesale & retail | 2021 |
| Maple Cloud Limited | Information & communication | 2022 |
| Maple Court (Chesterfield) Management Company Ltd | Real estate | 2018 |
| Maple Tree Wills and Estate Planning Limited | Professional & scientific | 2017 |
| Maplewood Homes Ltd | Construction | 2024 |
| Mapt Developments Limited | Extraterritorial | 2005 |
| Maraca Ltd | Other services | 2015 |
| Marah and Timms (Scaffolding) Limited | | 1970 |
| Marah Timms Electrical Contractors Limited | Construction | 2004 |
| Marchharv Limited | Hospitality | 2023 |
| Marcott Limited | Real estate | 2020 |
| Mardex Business Services Limited | Professional & scientific | 2026 |
| Mardex Engineering Services Limited | Professional & scientific | 2025 |
| Margincare Ltd | Health & social care | 2021 |
| Mariam Property Ltd | Real estate | 2020 |
| Marie Anson Photography Limited | Professional & scientific | 2025 |
| Marig Fashion Limited | Wholesale & retail | 2024 |
| Marine and Technical Quality Services Limited | Professional & scientific | 2018 |
| Marine Technologists Limited | Hospitality | 1980 |
| Maris Property Ltd | Real estate | 2021 |
| Maris Pumps Limited | Wholesale & retail | 2008 |
| Maris Residential Ltd | Real estate | 2024 |
| Mark Bates Properties Ltd | Real estate | 2020 |
| Mark Boswell Ltd | Transport & logistics | 2021 |
| Mark Finney Engineering Limited | Professional & scientific | 2003 |
| Mark Haigh Ltd | Construction | 2025 |
| Mark Money Technical Services Ltd | Professional & scientific | 2021 |
| Mark Newton Property Solutions Limited | Professional & scientific | 2026 |
| Mark Rothman Property Investments Limited | Real estate | 2016 |
| Mark Whatley Tree Services Ltd | Agriculture & fishing | 2003 |
| Markan Foods Limited | Hospitality | 2024 |
| Markan Ltd | Wholesale & retail | 2019 |
| Marketing Innovations (Chesterfield) Limited | Information & communication | 2013 |
| Markham Structural Contracts Ltd | Construction | 2018 |
| Markles Limited | Financial services | 2020 |
| Marko Cars Ltd | Wholesale & retail | 2024 |
| Marks Motor Mover Limited | Transport & logistics | 2012 |
| Marks Sattin (UK) Limited | Administrative & support | 1981 |
| Marmaris Barber S43 Ltd | Other services | 2026 |
| Marmaris Pizza Ltd | Hospitality | 2022 |
| Marney Consultancy Services Limited | Professional & scientific | 2015 |
| Marracaz Investments Limited | Financial services | 2021 |
| Marriott Construction Limited | Construction | 2018 |
| Marriott Geotechnical Drilling Ltd | Construction | 2015 |
| Marriott Motorsport Limited | Arts & recreation | 2024 |
| Marriott Well Engineering and Management Services Ltd | Professional & scientific | 2023 |
| Marriott's Motors Ltd | Transport & logistics | 2001 |
| Marroe Developments Limited | Construction | 2016 |
| Marsden Martial Arts LLP | | 2011 |
| Marsellor Limited | Professional & scientific | 2019 |
| Marsh Green Construction Ltd | Construction | 2020 |
| Marsh Green Estates Ltd | Agriculture & fishing | 2007 |
| Marsh Green Holdings Ltd | Construction | 2022 |
| Marsh Tree Care Limited | Administrative & support | 2024 |
| Marshall Initiative Ltd | Administrative & support | 2025 |
| Marshallsiteservices Ltd | Construction | 2026 |
| Martial Arts UK Ltd | Education | 2026 |
| Martin Bruno Limited | Professional & scientific | 2014 |
| Martin LEE Sports and Prestige Ltd | Wholesale & retail | 2020 |
| Martin-French Properties Limited | Real estate | 2022 |
| Marwal Holdings Limited | Financial services | 2025 |
| Mary Poppins Chesterfield Limited | Education | 2002 |
| Mary Swanwick OUT of School Club Ltd | Education | 2008 |
| Marzellan Group Limited | Financial services | 2025 |
| Masonry Cleaning Services Limited | Extraterritorial | 2020 |
| Master Class Studio Limited | Education | 2024 |
| Master Liveaboards Limited | Administrative & support | 2025 |
| Master Your Data Limited | Information & communication | 2013 |
| Masterfix Domestic Appliance Repairs Limited | Other services | 2001 |
| Mastergas Heating Services Ltd | Construction | 2026 |
| Masterglass Windscreens Ltd | Wholesale & retail | 2000 |
| Mastin Moor Convenience Store Ltd | Wholesale & retail | 2025 |
| Mastodon Management & Marketing Ltd | Professional & scientific | 2023 |
| Mat&Day Medical Ltd | Health & social care | 2025 |
| Matbrook Ltd | Manufacturing | 2013 |
| Mather of Tibshelf (Blacksmiths) Limited | Construction | 2018 |
| Matlock Building Services Limited | Construction | 2006 |
| Matlock Kitchen Holdings Ltd | Financial services | 2025 |
| Matlock Laundry Services Limited | Other services | 2025 |
| Matlock Motor Club Limited | Arts & recreation | 1989 |
| Matrix Engineering Services Limited | Manufacturing | 2007 |
| Maun Motors Commercial Sales Limited | Wholesale & retail | 2023 |
| Maun Motors Self Drive Limited | Administrative & support | 2023 |
| Mavan Travels Limited | Transport & logistics | 2025 |
| Maven Synergy Ltd | Professional & scientific | 2025 |